The lipids of whole blood. 2. The exchange of lipids between the cellular constituents and the lipoproteins of human blood

Abstract
The incorporations in vitro of radioactivity from sodium [Me-C14]acetate into the lipids of whole blood were measured. Lipids from the cells, plasma [beta]-lipoprotein and the a -lipoproteins were fractionated into unsaponifiable lipid, saponifiable lipid and phospholipid. Exchanges of both "un-saponifiable lipid" and phospholipid between cells and plasma [alpha]- and [beta]-lipoprotein were observed. There was no exchange of saponifiable lipid between the cells and [beta]-lipoprotein. Exchange was observed between the cells and the other plasma lipids. Approximate exchange rates were calculated for saponifiable lipid and phospholipid.

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